People will happily pay if you can save them time and make life easy for them.
Organization and Presentation
People love stuff that are organized and well presented. Same stuff that are organized sells better and at higher price than unorganized ones.
People will pay for quality stuff, knowing quality will give them a better assurance of usage.
People wouldn't want to make things that "maybe" will solve their problems or needs. They will pay for things that will give them the results they want.
This is a very powerful selling mechanism. People will buy when someone who has or is the Authority endorses it. Because people trust the Authority.
In addition, the marketing basics still apply, people need to Know you, Like you and Trust you before buying.
However, before that happens, you need to have the ability to Listen, Think and Solve their problems.